For uniformly-sized colloidal spheres, the gelation phase boundaries depend on the colloid concentration and attraction strength, and there has been extensive work mapping these boundaries in a variety of systems [1]}, [2]}, [3]}, [4]}, [5]}, [6]}, [7]}, [8]}, [9]}, [10]}. In depletion gels there is good agreement between gelation and the gas-liquid spinodal boundary [11]}, though there remains some debate concerning the generality of this agreement and the relative roles of percolation and clustering at the gel transition [8]}, [9]}, [10]}, [15]}.
